HP EliteBook 735 Maintenance and Service Guide - Page 109
Table 13-1, Troubleshooting steps for nonvolatile memory usage continued
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Table 13-1 Troubleshooting steps for nonvolatile memory usage (continued) Nonvolatile memory type Amount (Size) Does this memory store customer data? Does this memory retain data when power is removed? What is the purpose of this How is data entered into this How is this memory memory? memory? write-protected? System BIOS 9 MB Yes Yes Stores system BIOS code and computer configuration data. System BIOS code is programmed at the factory. Code is updated when the system BIOS is updated. Configuration data and settings are entered using the Computer Setup (BIOS) or a custom utility. NOTE: Writing data to this ROM in an inappropriate manner can render the computer nonfunctional. A utility must be used for writing data to this memory and is available on the HP website; go to http://www.hp.com/ support. Select Find your product, and then follow the on-screen instructions. Intel Management 1.5 MB or 7 MB Yes Yes Engine Firmware (present only in select Elite or Z models. For more information, go to http://www.hp.com/ support. Select Find your product, and then follow the on- screen instructions.) Stores Management Engine Code, Settings, Provisioning Data and iAMT third-party data store. Management Engine Code is programmed at the factory. Code is updated via Intel secure firmware update utility. Unique Provisioning Data can be entered at the factory or by an administrator using the Management Engine (MEBx) setup utility. The third-party data store contents can be populated by a remote management console or local applications that have been registered by an administrator to have access to the space. The Intel chipset is configured to enforce hardware protection to block all direct read/write access to this area. An Intel utility must be used for updating the firmware. Only firmware updates digitally signed by Intel can be applied using this utility. Bluetooth flash (select products only) 2 Mb No Yes Stores Bluetooth flash is A utility must be used for Bluetooth programmed at the factory. writing data to this configuration Tools for writing data to this memory and is made and firmware. memory are not publicly available through newer available but can be obtained versions of the driver from the silicon vendor. whenever the flash requires an upgrade. 802.11 WLAN 4 Kb to 8 Kb No Yes Stores 802.11 WLAN EEPROM is A utility must be used for EEPROM configuration programmed at the factory. writing data to this and calibration Tools for writing data to this memory and is typically data. memory are not made public. not made available to the public unless a firmware upgrade is necessary to address a unique issue. Webcam (select products only) 64 Kb No Yes Stores webcam Webcam memory is A utility must be used for configuration programmed using a utility writing data to this and firmware. from the device memory and is typically manufacturer that can be run not made available to the from Windows. public unless a firmware Nonvolatile memory usage 99
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